package com.zhoujiaman;

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet Filter implementation class filter
 */
@WebFilter("/success.jsp")
public class filter implements Filter {

    /**
     * Default constructor. 
     */
    public filter() {
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see Filter#destroy()
	 */
	public void destroy() {
		// TODO Auto-generated method stub
	}

	/**
	 * @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		// TODO Auto-generated method stub
		// place your code here
		request.setCharacterEncoding("utf-8");
		response.setCharacterEncoding("uft-8");
		HttpServletRequest req=(HttpServletRequest)request;//类型转换
		HttpServletResponse res=(HttpServletResponse)response;
		Object name = req.getSession().getAttribute("name");
		if(name==null){
			req.getRequestDispatcher("/index.jsp").forward(req, res);	
			return;
		}
		// pass the request along the filter chain
		chain.doFilter(request, response);
	}

	/**
	 * @see Filter#init(FilterConfig)
	 */
	public void init(FilterConfig fConfig) throws ServletException {
		// TODO Auto-generated method stub
		
	}

}
